<form method="post" name="register" action="?p=register">
   <input type="text" name="user" value="Username" /> <br><br>
   <input type="password" name="pwd" value="Password" /> <br><br>
   <input type="text" name="mail" value="Email" /> <br><br>
   <input type="submit" name="submit"/>
 </form>